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Ryan_RFlag for Australia

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My PC doesn't like 2 of the 3 networks it connects to...

I connect my home desktop PC to 3 different networks and sometimes none at all.

If I connect to a switch (25m away) to access internet and Dad's main PC (and what ever else is connected to the switch) i need to set TCIP/IP settings to Automatically assign network address

If I connect via crossover cable to my brothers PC to send him files or play network games the notification icon says Limited or No Connectivity - yet i can still connect to the PC but cannot play network games (IP addresses are in similar range (168.192.0.xxx)

If I connect to my Laptop (which has a manually set IP address of 169.254.105.45) i get the LAN connected 100mbps but cannot connect via explorer unless i change my IP address to 169.254.105.42

Background info:
I originally only connected to my Laptop for last few years or so using the 169.254... address. Recently my brother upgraded his PC and i set his IP address manually to a 169.254.... address too - no probs connecting to each PC or playing games over TCP/IP. Recently purchased a 100mbps 8 port switch to share the broadband at higher speeds at a temp basis - plug in when you need it and then plug out again. Upon installing this i reset the IP addresses to automatically assign themselves IP addresses that supposedly would be remembered by the switch. i never changed the IP address of my laptop since it connected fine and i also occasionally connect it to another network alltogether.
the problem described above is the result.

How can i use the auto config of IP addresses and connect to each PC first time every time with no probs? Thanks for all opinions/suggestions in advance.

Ryan R
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ECNSSMT

First you may not want to use the 169.254.x.x autoconfig IP addresses and go with the default 192.168.1.x network that the SOHO router manufacturers suggests.  As well, the other PCs should assigned 192.168.1.x IP addresses either manually or via DHCP.  

DHCP may be the easier alternative as your router manual may give you explicit instructions on how to do so.  Your PCs can be set to automatically request IP addresses.  This will handle the default gateway and dns addresses for you too.

Some how, I suspect that this will enable your PC (and maybe everyone else's) to access the internet without issues.

Regards,  
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ASKER

problem is when i set all the PCs to use DHCP auto IP addresses, i get limited/no connectivity when connecting directly via crossover
DHCP addresses work for every pc when they are connected to the switch, but when connected to each other there are problems - why?
When you use a crossover to connect two user computers together, nobody is playing DHCP.  The interface comes up, both ends send out DHCP requests, but of course nobody is there to reply.  After the request times out, they will default to picking a 169.254.x.x at random (after checking to see that it is used) and assign that as the IP addressk.

When you connect to your "switch", which either is your router or connected to your router, you're getting a DHCP response from there.
Under the properities of the TCP/IP set everything to be automatic. Then click the "Advanced" button and setup your static IP address.  This way you can still use the DHCP.  Then if the laptop can not find a IP address because you are using the cross over cable, it will use the static one you assigned.
If you have a router delivering DHCP, you should not even be using a cross over cable, it will isolate both PCs on the X-cable to an "indeterminate" IP address, meaning it loses its network connectivity.  WHy can you not just get rid of the X-over cable (or rewire it as regular ethernet) and put all systems on the same network, ALL getting an IP via DHCP from the router?  That will solve ALL your problems../
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ASKER

why?
a) my dad's house, and he doesn't want us all on the main network 24/7 - only have 1GB download limit per month at broadband speeds ad hard enough to keep under as it is
b) the only practicle way of achieving this would be to run cables through the roof

here is a visual rep of my lan for your assistance:

http://www.savefile.com/files/7257253 
The way I would do it then is to assign everybody a static IP address using the alternate configuration (http://www.microsoft.com/windowsxp/using/networking/learnmore/tips/autoconfig.mspx).  Put everybody on the same network using this method.  Try using an IP scheme below.  This way any two computers using the crossover cable will communicate.

\\Home (PC)
    IP:   10.0.0.101
    Mask: 255.255.255.0
\\Toshiba (laptop)
    IP:   10.0.0.102
    Mask: 255.255.255.0
\\Ryan (PC)
    IP:   10.0.0.103
    Mask: 255.255.255.0
\\Laptop (laptop)
    IP:   10.0.0.104
    Mask: 255.255.255.0
\\Todd (PC)
    IP:   10.0.0.105
    Mask: 255.255.255.0
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ASKER

have tried the alternate static ip addresses before with undesirable results, but will try again tonight. until then...
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ASKER

sorry forgot about this q. (didn't see it as open in my question list) whoops

will retry suggestions tonight and get back 'ere asap
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ASKER

btw Win2k pro doesn't have any alternate ip address sections, any thoughts?
For the Windows 2000 PC you will have to put in the IP address statically.  The IP address will need to be from the subnet that your modem/router is on.  You will also have to specify the correct mask, gateway and DNS server.  Do you know how to obtain that information?  Once you have that working, then click the Advanced button and then under the "IP Settings" tab click "Add" button to add another IP address.  Use the IP from the 10.0.0.x network.

What are the O/S on all the computers?  Also what piece of equipment is your DHCP server?
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ASKER

Guys, home network here. Running a adsl modem/router Netcomm NB5 i think it's called. that connects to the switch, plus \\Home is always connected to switch in the same room so is always online. \\Ryan, \\Laptop, \\Todd all reside at the other end of the house and connect to switch ONLY when needed for the net, then disconnected so we don't trip over the cables. The switch gives out the 192.168 addresses but before purchasing the switch i had all PC's statically set to 169.254 addresses. \\Ryan is usually disconnected from any network but sometimes is connected by crossover cable to \\laptop or \\todd to share files or play network games (getting rare now that i'm in Y12 VCE though). When changing from the crossover cable networks to the switch network, i also need to change my network settings from static 169.254 addresses to auto 192.168 addresses. there lies the other problem - the fact that every time i change to the switch i'm always getting different IP addresses (eg i won't just get 192.168.0.100 everytime, last octet always different and hard to keep track of)
On the computer called \\home
What is its:
IP addrees
Subnet Mask
Gateway
DNS1 and DNS2

You can find this information by the command "ipconfig /all"

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ASKER

is far as i know there are no values on any pc in the Gateway, DNS1 and DNS2 - haven't run that command yet though.
I retried the alternate IP config on my pc, when it connected to laptop it automatically picked the 169.254.105.42 address that i had set for it, however it couldn't connect to the laptop which had the same ip octects except for the .45 at the end - this being the prob here.

i did notice one important detail about the 2 ip address ranges, one being that my 169.254.105.xx addresses have a subnet of 255.255.0.0, and my 192.168.100.xxx addresses have a subnet mask of 255.255.255.0. my knowledge of these subnets is that since they are different (due to the large difference between ip addresses used) a connection is a bit hard to expect - at least a fully operational connection.

i'll wait here and see what you think - perhaps i'll manually need to set each ip to a 192.168 address and leave it at that. (assuming that could work)
My suggestion is going to be, make everybody static.  This way if you use a cross over cable it will just work but, if everybody is static then the Mask, Gateway and DNS needs to be set correctly.  If you can provide be the above information I can tell you what to setup on all your computers.  If you do not want to use static IP then I'm afraid you have exhausted all my resources.

On the computer called \\home go to run and type "cmd" then in the DOS window type "ipconfig /all"

Get me this info:
IP addrees
Subnet Mask
Gateway
DNS1 and DNS2
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ASKER

when i do this do you want all the pc's connected to the switch?
whenever i set addresses statically i only set an ipo address (and the mask appears auto), i've never set gateway, dns, wins, etc. can you refresh me as to what i would want to set as gateway - if anything?
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ASKER

if i set pc's statically do i need to type in a Gateway address? fill me in on what it does and if it affects my connection to the internet which i cannot access while ip address is set statically - only when on auto config
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ASKER

ipconfig /all uploaded to:

http://www.savefile.com/files/5085088 


noteworthy: when IP set manually - no internet access on that computer (broadband adsl via switch)
                  when auto - it works

is the gateway the ip address of the router? what's the standard 192.168.x.x address of it, i can't remember

Ryan R
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ASKER

found out that default ip address is 192.168.0.1
our pc's go by                               192.168.1.10_

somehow i don't think our router goes by that as i can't find it or ping it - however when i ping it i get a response containing "202.168.0.1"
when i ping that, expires in transit but the address "203.202.81.40" is shown
pinging that works but cannot see it in explorer and have no idea what it is...

are we getting close to solving this prob....
ASKER CERTIFIED SOLUTION
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KelloggMarine

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ASKER

thanks heaps guys - KM your above post worked a treat - if i knew the ip address of the router and the imporance of DNS addresses as mentioned by you maybe i would have half a chance of figuring it out myself. enjoy the rest of week...

Ryan R
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ASKER

it's a nice feeling to receive 2000 pts in one go, ain't it KM - you deserve it